ZrW2O8/Cu composite powders were prepared by the electroless plating method. The phase transformation and the thermal expansion properties of the composite powders with different coating thicknesses were investigated. Differential scanning calorimetry and high-temperature X-ray diffraction analyses revealed that the copper coating had considerable influence on the phase transition of ZrW2O8, which further affected the thermal expansion properties of the composite powders. With proper coating thickness, composite powders exhibiting minimum coefficient of thermal expansion values can be obtained based on the results of this study.
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